JP2016070067A - Geothermal power generation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a geothermal power generation system in which firstly, occurrences of scale, corrosion and frictional corrosion and the like are restricted and secondly, its facility cost is reduced and its generating efficiency is improved.SOLUTION: A geothermal power generation system of this invention comprises a system for generating power under application of geothermal steam A and a steam prime mover 11 is directly driven by the geothermal steam A. Then, the steam prime mover 11 is composed of a root type or a rotary type, a rotor is assembled into a casing, and no nozzle and no vane are installed. Then, at least an inner surface of the casing and a rotor surface are covered by a protection material and they are processed by lining treatment. The geothermal steam A is supplied to the steam prime mover 11 from a steam well 1 through a steam separator 2. The steam separator 2 separates hot water B from the geothermal steam A supplied from the steam well 1. The steam prime mover 11 is connected to a generator 6 having a main shaft installed while being adjacent to it.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a geothermal power generation system. That is, the present invention relates to a geothermal power generation system that generates electricity by turning a steam prime mover using geothermal steam such as a hot spring resort.

《Technical background》
Japan has many hot springs, and the use of water vapor from hot springs is attracting attention as a stable energy source near the volcanic belt.
That is, natural geothermal water vapor generated by the heat of magma is accumulated in several tens of meters to several thousand meters. Then, a geothermal power generation system has been developed in which a steam well is dug by boring, collected by self-injection, and a steam prime mover is used to generate electricity.

<Conventional technology>
As a conventional example of such a geothermal power generation system, the following two types are typical.
The conventional example of the first type is as follows. In the first conventional example, geothermal water vapor ejected from the ground is directly supplied to the steam turbine to rotate the steam turbine, thereby driving the generator. The first conventional example has not been adopted at present in the present situation as will be described later.
The second type conventional example is as follows. In this second conventional example, geothermal water vapor ejected from the ground is used as a heat source, first, hot water is generated, then low-boiling point fluid is evaporated with the hot water and supplied to the steam turbine, and the steam turbine is turned to generate power. I was driving the machine. There was also a conventional example that did not go through hot water.
As this second conventional example, a so-called binary cycle method is representative, and there are many examples of adoption at present.

<< Example of Fig. 4 >>
FIG. 4 is a configuration flowchart of the second conventional example described above. Here, the example shown in FIG. 4 will be described.
The geothermal steam A ejected from the steam well 1 is first supplied to the steam separator 2, and the hot water B is separated from the geothermal steam A. Then, the geothermal water vapor A is supplied to the heat exchanger 3 and the latent heat of condensation is replaced with the sensible heat of the hot water C.
The hot water C thus obtained is supplied to a heat exchanger such as a reboiler 4 and the sensible heat is replaced with the latent heat of vaporization of a low boiling point fluid such as chlorofluorocarbon or pentane. And the steam of the obtained low boiling point fluid D was supplied to the steam turbine 5, the steam turbine 5 was rotated, and the generator 6 was driven.
The low-boiling fluid D exhausted from the steam turbine 5 and reduced in pressure is supplied to a condenser, that is, a condenser 7 ′, cooled, condensed, and liquefied, that is, the latent heat of condensation is replaced with sensible heat of the cooling water W. After that, the pressure was increased by the pump 8 and circulated again to the reboiler 4. In the figure, 9 is a cooling tower for supplying and recovering the cooling water W to the condenser 7 ', and 10 is a conduit.

Examples of such a conventional geothermal power generation system include those shown in the following Patent Documents 1 and 2.
Japanese Patent Laid-Open No. 9-217674 JP 2009-2222066 A

By the way, the following problems were pointed out about such a conventional geothermal power generation system.
<First problem>
First, regarding the geothermal power generation system of the first conventional example described above, there has been a problem that scale, corrosion, polishing, etc. frequently occur and the equipment is easily damaged.
That is, the geothermal water vapor A contains mineral components such as calcium, corrosive components such as hydrogen sulfide, carbon dioxide, ammonia, and the like.
Mineral components such as calcium are likely to be scaled, attached, and coated on the nozzles and blades of the steam turbine 5 to cause turbine performance degradation and clogging.
Therefore, it has been pointed out that the steam turbine 5 needs to be frequently subjected to scale removal work, cleaning work, replacement work, and the like, and requires a large labor cost.

Further, it has been pointed out that corrosion damage is likely to occur in the nozzles and blades of the steam turbine 5 due to hydrogen sulfide and other corrosive components, for example, causing leakage of geothermal water vapor A.
Furthermore, due to the mineral components described above, erosion damage was likely to occur on the nozzles and blades of the steam turbine 5.
In addition, as a countermeasure against such scale, corrosion damage, polishing damage, etc., lining treatment can be considered, but it has been considered difficult structurally and economically. That is, the nozzles and blades of the steam turbine 5 have a complicated, troublesome, and diverse structure as is well known, and it was difficult to be familiar with the lining process of covering with a protective material.

<< Second problem >>
Secondly, the above-described geothermal power generation system of the second conventional example such as FIG. 4 has been developed and put into practical use in view of the actual situation of the first conventional example.
That is, in the second conventional example, the geothermal water vapor A is not directly supplied to the steam turbine 5 as in the first conventional example, but simply used as a heat source for the system. Accordingly, the occurrence of scale, corrosion, polishing and the like is suppressed with respect to the steam turbine 5.
However, regarding the geothermal power generation system of the second conventional example, problems have been pointed out in equipment cost and power generation efficiency.

That is, in the second conventional example, as described above, a plurality of heat exchangers and their associated facilities are required. For example, in the example of FIG. 4, a heat exchanger 3, a reboiler 4, a condenser 7 ', etc., many conduits 10, a pump 8, etc. are required. Therefore, the equipment cost was high.
Further, as described above, a plurality of heat exchanges are required from the geothermal steam A to the low boiling point fluid D. That is, heat exchange from latent heat to sensible heat has been performed a plurality of times, causing a reduction in power generation efficiency.
As a result, only about 10% of the amount of heat of the geothermal water vapor A is used, and a large amount of heat is not used and the heat is passed through. On the other hand, in view of the fact that the power generation output (recovered power F) is low, the need for effective use of heat and the need to improve power generation efficiency have increased.

<< About the present invention >>
In view of such a situation, the geothermal power generation system of the present invention has been made to solve the problems of the conventional example.
And this invention aims at proposing the geothermal power generation system which suppresses generation | occurrence | production of a scale, corrosion, polishing, etc. 1stly, and 2nd reduces an installation cost and improves electric power generation efficiency. To do.

<About each claim>
The technical means of the present invention for solving such a problem is as follows, as described in the claims.
About Claim 1, it is as follows.
The geothermal power generation system according to claim 1 is a system that generates power using geothermal steam, and the steam prime mover is directly driven by the steam.
The steam prime mover is of a roots type or a rotary type, and is characterized in that a rotor is incorporated in the casing and no nozzles or blades are provided.
About Claim 2, it is as follows.
The geothermal power generation system according to claim 2 is characterized in that, in claim 1, the steam prime mover is characterized in that at least the inner surface of the casing and the surface of the rotor are coated with a protective material and lined.
About Claim 3, it is as follows.
The geothermal power generation system according to claim 3 is the geothermal power generation system according to claim 2, wherein the water vapor is natural self-injected water vapor ejected from the ground, and contains a component for promoting generation of scale, corrosion, and polishing of the steam motor. Yes.
The steam is supplied from the steam well to the steam prime mover via the steam separator. The steam separator separates hot water from the water vapor supplied from the steam well. The steam prime mover is characterized in that a main shaft is connected to a generator.

About Claim 4, it is as follows.
In a geothermal power generation system according to a fourth aspect, in the third aspect, the water vapor is exhausted from the steam prime mover to a condenser. The condenser is characterized in that the exhausted water vapor is cooled, condensed, and drained.
About Claim 5, it is as follows.
In a geothermal power generation system according to a fifth aspect, in the third or fourth aspect, the steam prime mover is of a roots type. Accordingly, based on the adiabatic expansion of the water vapor supplied and exhausted, the pair of rotors rotate synchronously in opposite directions in the casing, and the rotational force is transmitted to the main shaft.
The water vapor is exhausted after moving between the rotor and the casing.
About Claim 6, it is as follows.
In a geothermal power generation system according to a sixth aspect, in the third or fourth aspect, the steam prime mover is of a rotary type. Accordingly, based on the adiabatic expansion of the water vapor that is supplied and exhausted, the one rotor rotates in the casing, and the rotational force is transmitted to the main shaft.
The water vapor is exhausted after moving between the rotor and the casing.

<About the action>
Since the present invention comprises such means, the following is achieved.
(1) The geothermal steam is supplied to the steam prime mover via the steam separator.
(2) The steam prime mover consists of a roots type and a rotary type.
(3) The high-temperature, high-pressure water vapor supplied to the steam prime mover adiabatically expands and rotationally drives the rotor, and drives the generator connected via the main shaft.
(4) The water vapor is guided from the high pressure side to the low pressure side as the rotor rotates, and exhausted while continuing adiabatic expansion. Accordingly, the rotation of the rotor is promoted by the pressure difference between the front and rear through the rotor.
(5) The water vapor exhausted from the steam prime mover is directly diffused into the atmosphere or supplied to the condenser.
(6) When supplied to the condenser, the water vapor is cooled, condensed and drained. As a result, the volume and pressure are reduced, so that the pressure difference before and after the rotor described in (4) becomes more prominent, and the rotation of the rotor is further promoted.
(7) By the way, the steam supplied to the steam prime mover contains facilitating components such as scale, corrosion, polishing, etc., but at least the casing inner surface and the rotor surface of the steam prime mover are lined. .
(8) That is, the steam prime mover is composed of a root type or a rotary type, and the structure is simple, simple, and simple, so that the lining process is structurally and economically possible. Thus, the occurrence of scale, corrosion, polishing, etc. is suppressed.
(9) Therefore, the water vapor can be directly supplied to the steam prime mover, and the system configuration can be simplified and simplified.
(10) Furthermore, since the water vapor is directly supplied to the steam prime mover, the heat quantity of the water vapor can be sufficiently utilized without loss.
(11) Now, the geothermal power generation system of the present invention exhibits the following effects.

<< First effect >>
First, generation of scale, corrosion, polishing, etc. is suppressed.
In the geothermal power generation system of the present invention, a root type or a rotary type is first adopted as a steam prime mover. It is adopted for the first time in a geothermal power generation system.
Therefore, the steam prime mover has a very simple, simple, and simple structure. No nozzles or blades are used, and at least the casing inner surface and the rotor surface are coated with a protective material and lined.
Therefore, as in the conventional example of this type described above, that is, like a steam turbine that uses nozzles and blades, the occurrence of scale, corrosion, polishing, and the like is suppressed.
In other words, although geothermal steam containing mineral components such as calcium and corrosive components such as hydrogen sulfide, carbon dioxide, and ammonia is directly supplied to system equipment such as steam generators, scale, corrosion, polishing, etc. Occurrence of problems due to
As in the conventional example, a decrease in turbine performance and clogging are avoided, and labor and cost required for scale removal work, cleaning work, replacement work, and the like are reduced. Of course, corrosion damage and polishing damage are also prevented.

<< Second effect >>
Secondly, the facility cost is reduced and the power generation efficiency is improved.
In the geothermal power generation system of the present invention, since the steam prime mover is lined, geothermal steam is directly supplied to the steam prime mover to generate power. Unlike the conventional example of this type described above, a plurality of heat exchangers and the like are not arranged, and the equipment cost is reduced accordingly.
Further, the heat quantity of water vapor is sufficiently utilized. Instead of evaporating water or a low-boiling point fluid using steam as a heat source and supplying the steam to the steam turbine as in the conventional example, the steam is directly supplied to the steam prime mover. Accordingly, the amount of heat of steam is effectively used, energy loss is reduced, power generation efficiency is improved, and power generation output (recovered power) is greatly increased.
As described above, the effects exerted by the present invention are remarkably large, such as all the problems existing in this type of conventional example are solved.

BRIEF DESCRIPTION OF THE DRAWINGS It is used for description of the form for implementing invention about the geothermal power generation system which concerns on this invention, and is the structure flowchart of the example. It is used for description of the form for implementing this invention, and is a structure flowchart of another example. It is a longitudinal cross-sectional explanatory drawing of a steam prime mover for description of the form for implementing the same invention. FIGS. 1 and 2 show a trilobal roots type. FIG. 1A shows the first half of the operation and FIG. 2B shows the second half of the operation. FIGS. (3) and (4) show a two-leaf roots type, (3) shows the first half of the operation, and (4) shows the second half of the operation. FIGS. 5 and 6 show the rotary type. FIG. 5 shows the first half of the operation, and FIG. 6 shows the second half of the operation. It is used for description of a prior art example and it is the structure flowchart.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to FIG. 1, FIG. 2, and FIG.
<< Outline of the Invention >>
First, an outline of the present invention will be described.
This geothermal power generation system is a system that generates electricity using geothermal steam A, and the steam prime mover 11 is directly driven by the geothermal steam A.
The steam prime mover 11 is of a roots type or a rotary type, has a rotor 13 incorporated in the casing 12, and does not include nozzles or blades. At least the inner surface of the casing 12 and the surface of the rotor 13 are covered with a protective material and subjected to a lining process E.
The geothermal steam A is supplied from the steam well 1 to the steam prime mover 11 via the steam separator 2. The steam separator 2 separates the hot water B from the geothermal steam A supplied from the steam well 1. The steam prime mover 11 is connected to a generator 6 to which a main shaft 14 is attached adjacently.
The outline of the present invention is as described above. Hereinafter, the present invention will be described in detail.

<< About geothermal water vapor A, etc. >>
First, the geothermal water vapor A and the like will be described with reference to FIGS. The geothermal water vapor A (hereinafter simply referred to as water vapor A) is composed of natural spontaneous vapor. That is, the water vapor A is self-injected, ejected and collected from the underground tropics through the steam well 1 and supplied to the steam separator 2 at a high temperature and a high pressure.
The steam separator is also referred to as a steam holder and separates hot water B from water vapor A. That is, the mixed fluid is separated into steam and hot water B is returned to the ground from the drainage groove V and the reduction well after passing through the tank 17 in the illustrated example.
The steam A is adjusted in pressure by a steam reservoir attached to the top of the steam separator 2 and supplied to the steam prime mover 11.
About water vapor A etc., it is as above.

<About steam prime mover 11>
Next, the steam prime mover 11 will be described with reference to FIGS. The steam prime mover 11 includes a root type shown in FIGS. 3A to 3D and a rotary type shown in FIGS. 3A and 3B. Is incorporated.
Then, high-temperature and high-pressure steam A from the steam / water separator 2 is supplied into the casing 12 from the inlet, that is, the suction port 15 provided in the casing 12 of the steam prime mover 11, and adiabatically expands. Rotate.
That is, the water vapor A is adiabatically expanded on the high-pressure side and the compression side in the casing 12, thereby generating a high-speed air current and rotating the rotor 13 at a high speed. Then, the rotational force is transmitted to the main shaft 14 of the rotor 13, the generator 6 connected to the main shaft 14 is driven, and the recovered power F is supplied to the outside.
In this way, the fluid energy (geothermal energy) of the water vapor A is converted into mechanical energy (kinetic energy, rotational energy) as work of the rotor 13, and this mechanical energy is converted into electrical energy of the generator 6.

The steam A is guided and transferred from the high pressure side / compression side to the low pressure side / open side as the rotor 13 rotates in the casing 12. Then, the water vapor A is further exhausted adiabatically to further reduce the pressure, and is discharged from the discharge port 16.
As a result, the pressure difference between the front and rear of the water vapor A through the rotor 13 is increased, and the rotational movement of the rotor 13 is promoted. The conversion between fluid energy, mechanical energy, and electrical energy described above is promoted.

By the way, in the example shown in FIG. 1, the water vapor A is subsequently diffused into the atmosphere G from the low pressure side of the steam prime mover 11 and the discharge port 16. As a result, the water vapor A expands and the pressure further decreases, so that the above-described pressure difference formation through the rotor 13 is further smoothed.
On the other hand, in the example shown in FIG. 2, the steam A is subsequently exhausted from the low pressure side of the steam prime mover 11 and the discharge port 16 to the condenser, that is, the condenser 7. The condenser 7 cools, condenses, and drains the exhausted water vapor A. In the figure, 9 is a cooling tower for supplying and recovering the cooling water W to the condenser 7.
And the water vapor | steam A becomes condensed water H in the condenser 7, and is returned to water, A volume shrinks and a pressure falls. As a result, the pressure difference through the rotor 13 is further increased as compared with the example of FIG. 1, thereby further promoting the rotational motion of the rotor 13. The condensed water H is collected in the tank 17 and then drained from the drainage groove V into the ground.
The steam prime mover 11 is as described above.

<About lining processing E>
Next, the lining process E in the steam prime mover 11 will be described with reference to FIG.
Since the water vapor A consists of natural self-exposure water vapor ejected from the ground, it contains the components that promote the generation of scale, corrosion, and polishing of the steam prime mover 11 in the form of gas or fine particles. That is, calcium, other mineral components, hydrogen sulfide, carbon dioxide gas, ammonia, and other corrosive components are contained because they are natural self-propelled water vapor from the ground.
Therefore, for the steam prime mover 11, at least the inner surface of the casing 12 and the surface of the rotor 13 are subjected to a lining process E.
That is, an acid-resistant, corrosion-resistant, and wear-resistant material is appropriately selected, and the inside of the casing 12 (including the suction port 15 and the discharge port 16) and the outside of the rotor 13 (including the main shaft 14) are covered. It has been. A material different from the main body material is coated by pasting, backing, lining, fusing, coating, etc.
The lining process E is as described above.

《Roots type and rotary type》
Next, the roots type steam prime mover 11 and the rotary type steam prime mover 11 will be described with reference to FIG. First, the roots type is as follows.
The steam prime mover 11 shown in FIG. 3 (1) to FIG. 4 (4) is of a roots type, and a pair of rotors 13 are disposed in opposite directions in the casing 12 based on adiabatic expansion of the steam A to be supplied and exhausted. Rotating force is transmitted to the main shaft 14 by synchronously rotating. The water vapor A is exhausted after moving between the rotor 13 and the casing 12.

First, in the root-type steam prime mover 11 shown in FIGS. 3A and 3B, the rotor 13 has a trilobal shape. As shown in (1), the water vapor A supplied from the suction port 15 is exhausted from the discharge port 16 by rotating the rotor 13 as shown in (2).
In the root type steam prime mover 11 shown in FIGS. 3 (3) and 4 (4), the rotor 13 has a double leaf shape. As shown in (3), the water vapor A supplied from the suction port 15 is exhausted from the discharge port 16 by rotating the rotor 13 as shown in (4).
In addition, about this roots type, about another structure, it is based on what is used well-known. For example, the two rotors 13 can rotate without contact with the inner surface of the casing 12 while maintaining a slight gap, and the rotors 13 can rotate while meshing and contacting with each other.

Next, the rotary type is as follows. The steam prime mover 11 shown in FIGS. 3 (5) and 3 (6) is of a rotary type, and one rotor 13 rotates in the casing 12 based on adiabatic expansion of the steam A to be supplied and exhausted. It moves and a rotational force is transmitted to the main shaft 14. The water vapor A is exhausted after moving between the rotor 13 and the casing 12.
That is, as shown in (5), the water vapor A supplied from the suction port 15 is exhausted from the discharge port 16 by rotating the rotor 13 as shown in (6).
In addition, about this rotary type, about another structure etc., it is based on what is well-known and used by an engine system etc. For example, the rotor 13 rotates eccentrically in the casing 12 that is a housing.
The root type and rotary type are as described above.

《Action etc.》
The geothermal power generation system of the present invention is configured as described above. Therefore, it becomes as follows.
(1) The self-injected water vapor A is supplied from the steam well 1 to the steam prime mover 11 via the steam separator 2 (see FIGS. 1 and 2).

  (2) The steam prime mover 11 is a root type or a rotary type, and a rotor 13 is incorporated in the casing 12 (see FIG. 3).

(3) The high-temperature, high-pressure steam A supplied to the steam prime mover 11 adiabatically expands, causes the rotor 13 to rotate, and the rotational force is transmitted to the main shaft 14 of the rotor 13 (see FIG. 3).
Accordingly, the generator 6 connected to the main shaft 14 is driven, and the recovered power F is supplied externally as a power generation output (see FIGS. 1 and 2).

  (4) As the rotor 13 rotates, the water vapor A is guided from the high pressure side to the low pressure side and continues adiabatic expansion, and is further reduced in pressure and exhausted. Accordingly, the pressure difference between the front and rear via the rotor 13 increases, and the rotation of the rotor 13 is further accelerated based on this pressure difference (see FIG. 3).

  (5) Then, in the example of the system of the present invention, the water vapor A exhausted from the steam prime mover 11 is directly diffused into the atmosphere G (see FIG. 1).

(6) In contrast, in another example of the system of the present invention, the steam A exhausted from the steam prime mover 11 is supplied to the condenser 7 (see FIG. 2).
Thus, the water vapor A is cooled and condensed, and the condensed water H is discharged. Along with this, the volume and pressure are reduced, so that the pressure difference between the front and rear through the rotor 13 described in (4) becomes more prominent, and the rotation of the rotor 13 is further promoted.

(7) By the way, since the water vapor A supplied to the steam prime mover 11 is made of natural self-injected water vapor ejected from the ground, it contains promoting components for scale generation, corrosion generation, and polishing generation.
Therefore, the steam prime mover 11 is subjected to a lining process E on at least the inner surface of the casing 12 and the surface of the rotor 13 (see FIG. 3).

(8) That is, the steam prime mover 11 employed in the system of the present invention is of a roots type or a rotary type, and the structure is extremely simple and simple compared to the steam turbine 5 used in this type of conventional example. It is simple (see FIG. 3). No complicated or cumbersome nozzles or blades are used.
Therefore, the lining process E described above can be implemented structurally and economically. Accordingly, the generation of scale, corrosion, polishing, and the like is suppressed for the steam prime mover 11.

(9) By adopting such a steam prime mover 11, the system of the present invention can directly supply water vapor A as described above (see FIGS. 1 and 2).
There is no need to provide a plurality of heat exchangers (3, 4, 7 ′), individual conduits 10 and pumps 8 for the heat exchangers (refer to FIG. 4), as in the conventional example of this type described above. The configuration is simpler and easier.

(10) In the system of the present invention, the heat quantity of the water vapor A is sufficiently utilized.
That is, the steam A is directly supplied to the steam prime mover 11 (see FIGS. 1 and 2), and the steam A is not simply used as a heat source as in the conventional example of this type described above. .
Compared with the conventional system (see FIG. 4) in which the hot water C and the low boiling point fluid D are interposed and evaporated, the heat quantity of the water vapor A is effectively used.
The operation of the present invention is as described above.

DESCRIPTION OF SYMBOLS 1 Steam well 2 Steam / water separator 3 Heat exchanger 4 Reboiler 5 Steam turbine 6 Generator 7 Condenser 7 'Condenser 8 Pump 9 Cooling tower 10 Conduit 11 Steam prime mover 12 Casing 13 Rotor 14 Main shaft 15 Inlet 16 Inlet 17 Tank A (Geothermal) Steam B Hot water C Hot water D Low boiling point fluid E Lining treatment F Recovered power G Atmospheric dissipation H Condensed water V Drainage channel W Cooling water

Claims (6)

A system for generating electricity using geothermal steam, wherein a steam prime mover is directly driven by the steam,
A geothermal power generation system consisting of a roots type or a rotary type, characterized in that a rotor is incorporated in a casing and no nozzles or blades are provided.   2. The geothermal power generation system according to claim 1, wherein at least the inner surface of the casing and the surface of the rotor of the steam prime mover are coated with a protective material and lined. In claim 2, the water vapor comprises natural self-exposure water vapor ejected from the ground, and contains a promoting component of scale generation, corrosion generation, and polishing generation for the steam prime mover,
The steam is supplied to the steam prime mover from a steam well via a steam / water separator. The steam / water separator separates hot water from the steam supplied from the steam well, and The prime mover is a geothermal power generation system characterized in that a main shaft is connected to a generator.   4. The geothermal power generation system according to claim 3, wherein the steam is exhausted from the steam prime mover to a condenser, and the condenser cools, condenses, and drains the exhausted steam. 5. The steam prime mover according to claim 3, wherein the steam prime mover is of a roots type, and the pair of rotors are synchronously rotated in opposite directions in the casing based on the adiabatic expansion of the steam supplied and exhausted. Rotational force is transmitted to
The water vapor is exhausted after moving between the rotor and the casing, and then the geothermal power generation system. 5. The steam prime mover according to claim 3, wherein the steam prime mover is of a rotary type, and based on the adiabatic expansion of the water vapor supplied and exhausted, one of the rotors rotates in the casing, and the main shaft rotates. Is transmitted,
The water vapor is exhausted after moving between the rotor and the casing, and then the geothermal power generation system.

Images